Preliminary study on mercury pollution affecting soil bacteria near a mercury mining area
Frontiers in Microbiology,
Год журнала:
2025,
Номер
16
Опубликована: Фев. 7, 2025
In
order
to
further
explore
the
effect
of
mercury
contamination
soil
(nearly
20
years)
near
a
mining
area
(Tongren,
Guizhou,
China)
on
diversity
and
structure
bacterial
communities,
five
groups
samples
(SMO2,
SMO20,
SMO30,
SMO500,
SMO650)
were
collected
at
distances
2,
20,
30,
500,
650
m,
respectively,
from
only
sewage
outlet
(Guizhou,
China).
All
0-20
cm
topsoil
layer.
After
processing
them,
microbial
DNA
was
extracted
each
sample,
sequenced
via
high-throughput
sequencing
technology.
The
results
indicated
significantly
greater
community
in
SMO2,
SMO650
(relative
high
contents)
than
SMO300
SMO500
low
contents).
Alpha
analysis
revealed
that
SMO2
SMO20
exceeded
SMO650.
identical
distinct
dominant
communities
within
sample
both
phylum
class
levels.
According
analyzed
relationships
between
environmental
factors
abundance
for
group,
pH,
distance
(mercury
content),
electrical
conductivity
(EC)
had
impacts
available
N,
P,
K.
survival
relative
taxa
provides
compelling
evidence
adaptability
bacteria
long-term
environment.
this
study
provide
scientific
reference
impetus
research
mechanism(s)
responsible
tolerance
stress
mercury-contaminated
soil.
Язык: Английский
Assessment of Heavy Metals in Surface Waters of the Santiago–Guadalajara River Basin, Mexico
Hydrology,
Год журнала:
2025,
Номер
12(2), С. 37 - 37
Опубликована: Фев. 17, 2025
The
Santiago–Guadalajara
River
Basin
has
an
area
of
10,016.46
km2.
Metropolitan
Area
Guadalajara,
within
the
basin,
is
second-largest
city
in
country,
with
more
than
5
million
inhabitants.
growth
urban
population,
as
well
industrial
and
agricultural
activities
insufficient
infrastructure
for
sanitation
wastewater
its
reuse,
have
caused
environmental
deterioration
surface
waters
gradual
depletion
groundwater
resources.
To
assess
level
contamination
from
presence
heavy
metals
a
monthly
monitoring
campaign
was
carried
out
at
25
sampling
stations
located
main
tributary
streams
July
2021
to
April
2022.
following
decreasing
sequence
found
according
mean
concentration
values:
Fe
>
Al
Mn
B
Ba
Zn
As
Cu
Cr
Ni
Pb
Cd.
Heavy
Metal
Pollution
Index
(HPI)
method
applied
risk
aquatic
life,
finding
average
global
HPI
value
305.522
which
classifies
it
critical
range.
results
also
reflect
health
risks
due
As,
Cd,
some
monitored
stations.
It
will
be
necessary
expand
network,
identify
point
non-point
sources
contamination,
implement
measures
pollution
control
protect
life
human
river.
Язык: Английский